Machine for folding the edges of textile and similar articles



Sept. 21,1926. Y 1,600,364

. E. B. RQBY MACHINE FOR FOLDING THE EDGES 0f TEXTILE AND SIMILARARTICLES Filed June 22. 1923 a sheets sne'et fiaww 5.304

a Attorney Sept. 21 1926. 1,600,364

. E. B. ROBY MACHINE FOR FOLDING THE EDGES OF TEXTILE AND SIMILARARTICLES Filed June- 22. 1923 a sheets-Sheet 2 @W Atlomey Sept. 21,1926; 1,666364 E. B. ROBY MACHINE FOR FOLDING THE EDGES 01" TEXTILE ANDSIMILAR ARTICLES Filed June 22. 1923 8 Sheets-Sheet, 3

, Ir wenlor 3 mam Q Attorney Sept. 21 ,1926. a i 1,600,364

E. B. ROBY I 1 MACHiNE FOR FOLDING THE EDGES 0F TEXTILE AND SIM- 111KBARTICLES Filed June 22. 1923 I a She ts-She'et 4 Inventor EMF 5- mySept, 21 1926o OF 'rsxnns AND SIMILAR ARTICLES a sheets-sum 5 MACH-HIEFOR FOLDING EDGE Filed June 22. 1923 Inventor Ema w B. Eoy

Allomey 9% ti. mmx

Sept. 21 1926. E j RUBY MACHINE Fon FOLDIBG. THE mas 0F TEXTILE Am)SIMILAR ARTICLES 7' Filed Juner 22. 1923' 8 Sheets-Sheet 6 Q I IIflllllllllll Ill fimuuuuun ynumunn Sept. 21, 19261 B. Row

MACHINE FOR FOLDING THE EDGES OF TEX-TILE AND SIMILAR ARTICLES FiledJune 22. 1923 s sheets Shet v A TicqiE- Inventor I B fi'am/a/vf 5 BayAttorney Sept. 21,1926. 1,600,364-

' E. B. ROBY MACHINE FOR FOLDING THE EDGES OF TEXTILE AND SIMILARARTICLES Filed June 22. 192:5 a sheets-$11601; a

a I xi 1/? III III

I 0 Edward B.%Z1/

a Atlofney Patented Sept. 21, 1926.

' UNITED STATES PATENT one! EDWARD B. ROBY, OF TROY, NEW YORK, A SSlGNOR TOS. AND ;R. FOLDING- MACHINE COMPANY, INC., OF GREENISLAND, NEW YORK, A CORPORATION OF NEW YORK.

MACHINE FOR FOLDING THE EDGES OF TEXTILE AND SIMILAR ARTICLES.

Application filed June 22, 1923 Among the principal objects which thepresent invention has in view are: to adapt a machine of the charactermentioned for interchanging parts for various sizes and patterns of thearticle being manufactured; tofacilitate the removal of thearticle inquestion fronithe machine; to so' lay the material being "folded as to.avoid the formation of roughened or padded sections in the completedarticle; to provide gages whereby the operation of-the coordinatedelements in the machine may be pre-arranged; to provide means forheating the folded edges during the period of pressure applied theretofor setting the fold; and to perfect the construction and arrangement ofa machine of the character mentioned for reducing the friction and wearin the parts thereof.

Drawings.

Figurel is a front elevation of the machine constructed and arrangedinaccordance with the present invention, the ma- Figure 4 is a top planview of the bed, plate of the machine showing the pressure elevator.

Figure 5 1s. a horizontal section of the the line 55 in Fig. 1.

Figure 6 is a'detailed view on enlarged scale showing the liftingmechanism with the SOtlOD being taken IQSS frame, SGCtlOll b8111 takenas 021 Serial No. 647,094.

Figure 10 is a top plan View of parts of the mold.

Figure 11 is a vertical section of one of the cam shifting heads withwhich the foldthe line1212 in Fig. 11.

Figure 12 is a detailed View in plan of one 01- the rotary camguides'with which the machine is provided.

Figurell is a vertical section of the prime mover with which the pressis pro 'vided, the section being taken on the line 14 1et in Fig. 15.

Figure 15 is a,horizontal section of the same. the section being takenon theline 15-15 in'Fig. 14..

Figure 16 is a vertical section of the valve head with which the primemover is provided the section'being taken on the line 1616 in Fig. 14.

F igure-17 is a detailed view of a portion of one of the die membersconstructed and arranged to upset and turn in the corner of the articlebeing handled.

Figures18, 19, 20, 21 and22 show corner sections of the article, beinghandled in the -progressive steps of'folding and pressing the edgethereof.

Figure 23 is a side view on enlarged scale of the die head.

Figure 24 is a top plan view of the same.

Figure 25 is a longitudinal section of the same, the sectionbeing takenas on. the line 2525 in Fig. 24.

Figure 26 is a cross section of the same,

v as on the line 2626 in Fig. 23.

Figures 27 and 28 are detailed views of die sections and means forholding the same in service; the first mentioned figure being partly insection to show the interior construction thereof. a

Figure 29 is a top plan view in detail of the die head supporting arm.

Figures 30,31 and 33 are detailed views of fragments of a collar theedge of which. is turned by the herein described machine showing theconstruction of the inner corners of an article being constructed andthe method employed in constructing the same.

Figure 32 is a sect-ion of the article shown in Figure 31, the sectionbeing taken on the line 3232 in said Figure 31.

Description.

In the drawings there is shown a machine embodying the present inventionas adapted for folding the edges of mens collars preliminary to sewingthe same, and more particularly the invention relates to improvements inthe construction shown in Patent No. 1,260,060 granted me under date ofMarch 19, 1918 for folding machines, to which patent cross reference ishere made. The style of collar to manipulate which the machine isdesigned has an outline correspending to the die shown in Fig. 2a of thedrawings as well as to the molds for receiv- ,ing the same which issupported on the bed plate 51. The bed plate 51 is mounted in the well52 to be elevated therein by the levers 53 at the opposite ends of thesaid plate. The levers 53 as can be seen best in Fig. 6 of the drawingsare each provided with a short arm 54. The long arm of the lever 53 isoperatively connected by the adjusting screws 55 with the yoke 56 asshown best in Figure 1.

The yoke .56 is normally supported by a cushion spring 57 so that thelevers 53 are held in their inactive position. The levers 53 arebifurcated at their ends for forming bearings for the rocking nut 58 andfor the wheels 59. Intermediate the wheels 59 is disposed a leaf spring60, the free end of which bears against the lower edge of the webbingflange with which the plate 51 is provided. While the opposite end ismade fast by means of a bolt 61 to the lever 53, intermediate the endsof the spring a screw 62 is disposed in the lever 53 for the purpose ofvarying the tension on the spring 60.

In the inoperative relation of the plate 51 it is supported by thesprings 60. lVhen the levers 53 are rocked on their fulcrum 63, thewheels 59 engage the pendent flange of the plate 51 and thereafterpositively elevate the said plate in proportion as the yoke 56 isdepressed.

The yoke 56 is depressed by the operation of the piston 6 -1 in thepower cylinder 65. The operative connection between the piston 6 1 andthe yoke 56 is formed by the piston shaft and set collar 67, the latterbeing mounted on the rod 68 at will and'by means of a set screw 69.

The power medium preferably employed in the machine herein disclosed iscompressed air.' This is supplied by the pipe 7 O communicating betweensaid port and the valve chamber 71. The exhaust pipe 75 is connectedwith the port 76 which is exposed by the valve 77 at the extremes oftravel of the said valve and by means of the passage 78, usual to theconstruction of reciprocating slide valves. This construction can bebest seen in Figures 1 1 and 15 of the drawings.

As can be best seen in Fig. 2 of the drawings, a dash pot 7 9 having aperforated piston 80 mounted therein controls or quiets the operation ofthe piston- 64 and parts connected therewith. The piston shaft 66 hasconnected therewith the piston rod 68 to which is permanently attachedthe piston 80, a gland packing 81 preventing the leak therefrom of asuitable liquid with which the dash pot 79 is provided.

As can be best seen in Fig. 2 of'the drawings when disposed inactivelythe yoke 56 and the portion thereof through which the rod 68 extends isspaced apart from the collar 67 to provide a predetermined amount oflost motion in the operation of the machine prior to the actual rockingof the levers 53. During this period, or in correspondence with the lostmotion, the levers 82 and 83 are rocked on their pivots 841 and in theorder named.

As will be seen by reference to said Fig. 2, the opposite sides of theshaft 66 ad jacent the cylinder and where the same extendsv through thelower head thereof, the said shaft has a relatively short recess 85 anda relatively long recess 86. In the short recess 85 a head 87 on thelever 82 rests while in the long recess 86 a similar iead 87 belongingto the lever 83 deposes. The result of this construction is thatimmediately the piston 64 and the shaft 66 begin their downwardmovement, the lever o2 is rocked on its pivot 84-, the head 87 beingforced out of the recess 85. This effect is consummated and the free endof the lever 82 which is operatively connected by a link arm 88 iselevated to its full movement before the head 87 of the lever 83 issimilarly forced from its recess 86 to be rocked so that the free endthereof and the link arm 88 with which it is connected in turn elevated.

It is subsequent to the complete elevation of the link arms 88 and partsassociated therewith that the collar 67 engages the yoke 56 which isthereafter depressed by the continued movement of the piston 64 andparts associated therewith.

As explained, the rocking of the levers 53 operate to primarily compressthe springs 60 and thereafter by the wheels 59 force the bed plate 51upward with full force to compress the edge of the collar being treated,the edge of which has in the meantime been folded. 1

By observation of Fig. 2 of the drawings mam it will be seen that thelink arms 88 are each providedzwitha hollow open ended tubular head'89The heads 89.as will be seen in F ig.

2 ofthe drawings have a squaredrear extension 90 guided by the flanges91 of'thebracketplate 92. Movably mounted in each ofth'e heads 89 areends of'levers 93,fthe opposite ends of which are bifurcated to formyokes having disk. ends 94: fitting into the grooves in the nuts95whichare slidably mounted on the rods 96 as best seeninFigures 1,11 and12 of thedrawings. The rods 96 have screw-threaded sections at the lowerends whereon are mounted. the nut and lock-nut 97 and98, respectively.The disposition of' the nut 97 regulates the-amount of lost' motionprovi ded for the levers 93when rocked by. the link arms 88, and levers82 and 83 respectively. I V Fromthe'foregoing it willbeseen that aseachof'the link arms 88' and the heads 89 connected therewith areelevated,.the nuts 95 are depressed until'they engage the nuts 97-.Thereafter the nuts 97. and parts connected therewith are depressed tothe end that the sliding. heads 99 and parts associated therewitharemoved in accordance with the direction to which the cam arms 100 areturned;

Asis seen best in Fignres 11' and- 12, the arms100 are rigidly connectedwith shafts 101 which are reciprocatively mounted in rotary tubular.extensions 102 of the slide plates: 103. The pl'ates103, as best seen inFig. 13'of the drawings, have bolting flanges 104. to receive the. guardrails 105, which hold the heads 99 on'theplates 103'. In Fig. 13 ofthedrawings may, also be seen the bore 106 provided for the shaft:101 andan offset recess 107 to receive the arms 100 when depressed attheworkingv position as shown in Fig. 11 of the drawings. I

It will be noted by reference to Figures 1 and 2 ofthe drawings that thelevers 93 are disposed in pairs, each pair operating simultaneously toelevate or depress the arms 100 connected therewith. It will also beunderstood from .theforegoing description and as seen best in Fig.2*that the pair of levers 93 and the link arms 88 connected therewith atthe back of the machine, are. operated in advance of the levers 93 atthe front of'the machine. This precession of the operation at the rearofthe machine results in folding the edge of the collar turnedtoward therear of the machine in advance of a similar operation on the edge. ofthecollar turned: toward the front of the machine.

The collar above referred to is blanked or cut from .a suitable materialand in accordance with the pattern the dimensions where of aresufiiciently greater than the die shown -in Fig. 24 of. the drawings,to. permit folding the edge over the said die to form a; hem

for the collar which may subsequently be lever 128 is with; a foottreadle 130 which construction oan be best seen in F ig; 2 of thedrawings. To the arm 126 iswattached a pull spring 131, which normallydpresses'the. free end shownin Fig. 2eis preferably formech by endsections 108 and: a middle section. 109;

Said'sections are operatively connected with spindles 1 10 as'bes't seenin F igures'26'and 28' oftli'e drawings ,the said spindles being eachprovided with locking nicks 111 101" engagement by-the springs 112 ascan be best seen in" Fig. 24' of the drawings. The spindles '110 areprovided with foot plates 113 to which the said sections 108 and-109 areremovably attached bymeans of-clips 11 1. By this arrangement of thesections 108 fand109 a'variety of shapes may be, employed, in connectionwith the present machine. V p The springs 112m mounted on; small blocks115, the ends-of the'saidspringsresting in edge openingslots116inthe-endsof said. blocks. The slots'116 extend through thewalls of bores 117 in the blocks provided to receive the" spindles 110.In the working position of thespindles and the blocks the'nicks 111*register-with the slots 116 so that the endsof the springs 112 restwithin the nicks lll-thereafter forming an efficient lock to'prevent'the withdrawal of the said spindles from the blocks 115. Thecenter block115 connected to the'middle die section 109 is rigidly secured to achannel bar 118 by. means ofaqscrew 118, as best in Figures 2"ai1d j29is'prefer'ably mounted on" the shaft"120',' the bearings whereof areformed"in-brackets 1'21. T-ho arm11-9 is held in operative positionprimarily. by the arm 122 and the compression spring-123' which restsbetween the, arms 119"and"122. The

arm 122 is pivoted on the shaft 120' and has a'rearwardextension attheend whereof'is a.foot plate.124.' V, I

The foot plate 12%F'as' is shown best in Fig. 2 of the drawings isinterposed in the path of the roller 125 mounted at the end of the arm82" which as previously stated is raised by the movement of the piston64 and in advance of the arm'83. The shaft 120 to which the arm 119 isrigidly secured is operating. rod 127 is connected that is at tached tothe footoperated lever128. The pivoted at 129 and is provided of'the arm126and the free'end 'of the level 128. In this position the shaft 120 isrocked to dispose the arm 119 and parts associated therewith includingthe die sections 108 and 109, in the raised position leaving the moldsopening on the bed plate 51 free for the introduction of the clothblanks from which the collars are constructed.

From the foregoing it will be seen that when the operator places hisfoot on the treadle 130 to depress the same, he rocks the shaft 120 andthe retaining arm 119 into position where the die sections 108 and 109press the cloth into the mold to rest on the bed plate 51. At the sametime the back of the arm 126 impinges upon the setscrew 132 on the arm122 which rocks the said arm 122 to the position shown in Fig. 2 of thedrawings. If now power he applied to move the piston 64 it. will be seenthat the first result of the movement of the said piston 64 will be tointroduce the end of the arm 82 and the roller 125 carried thereby inthe path of and in engagement with the foot 124 of the arm 122. Fromthis it is obvious that thereafter the die head at the end of the arm119 is held firmly against the subsequent pressure imparted by the bedplate 51 when the same is elevated by reason of the engagement of thenut 67 with theyoke 56. It will further be observed that in accordancewith the tension of the spring 123, the pressure is maintained on thearm 119 and the die sections 108 and 109 carried thereby.

The valve 77 is moved by the rod 133 which is connected by means of apin and slotted end to the lever 128. The slot provides for lost motionin the lifting of the of the edges of the cloth sections 108 and 109over die sections 108 and 109 as rod 133 sufiicient to rock the arm 119to retaining position. rod 133 moves the valve 77 to expose the port 72with the result that compressed air is delivered above the piston64'which thereafter is depressed as rapidly as the dash pot 79 and partsassociated therewith will permit, resulting successfully in the foldingheld by the die the said. dies and subsequently applying pressurethereto from beneath by elevating the bed plate 51. The folding of theedges is accomplished by first upstanding the material around the thematerial is forced upon the bed plate 51 by the operation of theretaining arm 119, the channel bar 118 and the die sections above-mewtioned. In this operation the material is forced downward through themold formed by the heating plates 134 and the folding sections 135, 136and 137 to rest on the bed plate 51 in the mold formed by the mold plate138. After the raw edge of the ma- I terial is placed thus upstanding,it is folded over the; die sections 108 and 109, the foldin; sections135, 13351151., 137 being shifted Thereafter the lift of the.

toward the center of the die for this purose.

The folding sections 135, 136 and 137 rest snugly on the overturnedmaterial above the die sections 108 and 109. The sections 135, 136 and137 are thus moved in correspondence with the movement of the cam arms100 and the sliding heads 99 operativelyj connected therewith. To thisend the plates 135, 136 and 137 are provided with upstanding stud posts139'and 140. As shown best in Fig. 3 of the drawings the in the heatingplates 134. The stud posts 139 and 140 are operatively connected withshifting bars 142 which are nected'to the brackets 143. The brackets 143as best shown in Figures 11 and 12 are provided with collars 144pivotally connected with the circular turret 145 on the sliding heads99. The posts 140 are fixedly attached to the ends of the bars 142, tomove in correspondence therewith. The bars'142 are maintained inparallel'relation to the swing bars 146 and to the work being performed,by links 147 which as shown best in Fig. 3 of the drawings, arepivotally attached to the bars 142 and 146 and are of equal len h. I

From tie foregoing it will be observed that when the sliding heads99-are moved, the cam arms 100shift the brackets 143 toward the centerof the machine in correspondence with theangles of inclination of thesaid cam arms 100, the bars 142 being rigidly attached to the brackets143 by the bolts 148. The said bars 142 are moved in for locking theextensions 102 in adjusted position. To assist in the adjustment theplates 103'have pointers 150 which extend over and register with thecalibrations 151 provided on the bosses 152 of the bed plate of themachine.

The plates 134 are heating elements 153. 153 areconstructed inaccordance with any approved design and are preferably placed in theplates 134 adjacent the edge of their supplied with electrical Theheating elements posts 139 protrude through the openings 141 rigidlyconcentral opening which corresponds to the shape of the assembled diesections 108 and 109 and to the opening in the mold plates 138 to whichthe said heating plates 134 are rigidly attached by the stud screws 154shown best in Fig. 10 of the drawings, the said heating plates havingperforatiens 155 through which the said stud bolts extend when the partsin the machine are assembled.

It will be understood that the 'heating'plates 134 are removablyattached .to'the present machine and adjustably' held thereon by bolts156. The heating elements are supplied by electrical current, thecurrent wiring of said elements being connected to the plug terminals157 to which in service socket terminals are applied, which areconnected with a source of electrical supply.

1 From the foregoing it will now be seen that when operating themachine, the attendant places a cut blank over the mold opening in theplates 134, 135, 136, and 137' and plates 138, the edges of the blankoverlying the opening in the plates 135, 136, 137 and 138. The blankhaving been placed, the treadle 130 is depressed so that the lever 128is rocked on its pivot 129. Before the rod 133 is engaged, the rod 127is lifted to depress the retaining head 119 to-its working'position inarriving at which, the die sections 108 and 109 engage the blank andforce the same into the mold; opening of the plates 138 and betweenthe'inner edges of the folding sections 135, 136 and 13 Y The aboveisthe position assumed by the pa-rtswhich upturns the edges of the blankin the mold. When the lever 128 engages the rod 133, the rod 133 islifted by the continued movement of the lever 128 with the result thatthe rod'133 shifts the valve 77 upward to expose the passage 72'to thecompressed air coming through the pipe 70.

r This compressed air entering above'the piston 64 depresses the samewith the shaft 66 with which it is connected. The shaft '66 in itsoperation rocks the levers 82, 83 in the manner above described, withthe-result that pairs of lever-s 93 at the back of the machine and atthe front of the machine are rockedsuccessively in the order named Theouter or disk ends 94 thereof being depressed The nuts 95 engaging thenuts 97 on the rods 96 depress the cam arms 100- with'the result thatthe sliding heads 99 and brackets 143 are moved toward the center of themachine in correspondence with the angle at which the slide plates 103and the cam arms 100 are set.

'Asabove described the movementof the brackets 143 toward the center'ofthe machine operating through the bars 142- and 146 shift the foldingsections 135,136 and 137 toward the center of the mold and over theadjacent edges of the die sections 108 and 109 folding the material ofthe blank which was upstanding to lay it down clo'se upon the said diesections.

It will be noted that the-precession of the movement of the levers 93 atthe backof the machine in relation. to the levers in front of themachine results in laying the upstanding edge of the blank upon the diesections at the back of the machine before the rest of the material islaid.

Theabove actions resulting in the overlaying of the edge of the machineis completed and the folding sections 135 136 and 137 are brought torest before the shaft 66, and the rod 68 connected therewith engages theyoke 56. When the engagement does take place, the levers 53 are rockedto lift the bed plate 51 with force, pressing thematerial of the blankand the overturned edges thereof upward against the sections 135, 136and 137. This pressure is exerted until the operator releasing thetreadle 130 permits the spring 131 to pull the rod 127 downward rockingthe lever 128 to depress the rod 133 and shift the valve 77 so that thepassage 78 opens communication between the inlet port 72 and the exhaustport 76, and open the port 74 to admit compressed air to enter thepiston 64 which is then returned rapidly to its lifted positionreversing the various operations above described, resulting in relievingthe pressure on the .bed

plate 51, retracting the foldingsections 135,

153 is transferred to the sections 135, 136

and 137, which being heated, operate upon the over-folded edge. By thisarrangement, however, if for any reason the machine is arrested in itsoperation with the pressure applied to the folded collar edge, the heatin thesections 135,136 and 137 is gradually llO diminished by absorptionto the collar and is augmented by the time during. which the pressure ismaintained The bindingztermi; nals 159 as seen best in Fig. 6 of thedrawings' supply electric current to an electric heating element ofconventional type containedin the pad 158. 7

It now remains for the' operator to remove thecollar from the diesections 108 and 109. vThis is accomplished by moving .the end blockswhich support the dieIsections 108 toward the die section 109. Thespaces between the die sections 108 and 109 shown best in Fig. 24 ofthe.drawings is sufiicient to'provide enough movement of the die sec tions108'to clear the same from engagement with the overturned edges of thesaid blanks. When thus cleared it is" obvious that the blanks maybequickly and easily removed from the said die sections. To the end thatthe blocks 115 may be shifted, they are slidably mounted in supportingblocks 160. The blocks 160 as best shown in Fig. of the drawings arefixedly mounted on a channel .bar 118 by means of screw bolts 161. Theblock 160 has extensions 162 and 163 which are adapted to rest in therecesses 16%- and 165. The extension 162 normally engages the block 115for maintaining the service relation thereof. The extension 163 extendsinto the recess 165 only when the block 115 is moved backward againstthe pin 166 to compress the spring 167 behind the said 111. r p Engagingthe outer end of the pin 166 is a spring 168 which is anchored at thelower end to the block 115 and which normally supports the said block inservice relation to the channel bar 118 and to the block 160. When it isdesired to remove the compressed collar or blank from the die sections108 and 109, the end blocks 115 are moved toward the center block 115,or referring to Fig. 27

. of the drawings the block 115 shown therein would be moved to theright until the die 108 connected with this block 115 is drawn fromunder the overturned edge of the blank.

It will be noted by reference to Fig. 27 that the inner ends of therecesses 16% and 165 are flared or widened. This permits the block 115to be rocked on the center of the block 160 without disturbing the saidblock.

The rocking action thus imparted to the die 108 with which the block 115is connected disposes the blank in position to be readily removed fromthe said die. When the block 115 is thus rocked the spring 168extending. from the pin 166 is stretched. hen the block 115 is releasedthe spring 168 returns the block to its normal position.

In Figures 30 to 33 inclusive are shown modified forms of collar blanks.These blanks have the material thereof adjacent the inner angle of theblank embossed to form raised sections 169 at the outer edges of thematerial constituting the blanks. WVhen this material is thussubsequently overturned as shown in Fig. 33 of the drawings, it will befound that the material has been stretched by embossing the same so thatit extends around the inner angle formed by the overturned edge withoutcrinkling or ridging.

In Figures 18 to 22 of the drawings there is illustrated, step by step,the method of turning the outer angles or corners of the blanks and toperfect the joint indicated in Fig. 22 by the numeral 170. Thesuccessive steps are shown as in Figure 19 where the pointed extremity171 is upturned, in Fig. 20 where the said pointed end 171 is foldedover, in Fig. 21 Where the sides of the pointed ends 171 and the edge172 of the blank 173 together With the sides of the said end 171 havebeen upturned, and finally in Fig. 22 where the edge 172 folded upon theblank 173 as well as the sides of the extremity 171.

The outer or pointed corners of the collar are formed as above describedmy means of the block 174 and the side pieces 1'75 and 176 shown best inFig. 17 of the drawings.

Theside pieces 175 and 176 and the blocks 17% are permanently mountedupon the folding sections 136 as shown best in Fig. 9 of the drawings.

When the sections 135 and 136 are thus equipped the materialconstituting the blank is first acted upon by the blocks 17 1. Theblocks 174 upturn the pointed extremities 171. In the position shown inFig. 19 of the drawings the continued downward movement of the diesections carries the blank between the side pieces 175 and 176 impartingto the material adjacent the extremities 171, the fold indicated in Fig.21 of the drawings. From this point the con tinued movement of the diesections 108 and 109 carries the material down between the mold plates138 to receive the folding sections 135, 136 and 137 as the same areimmediately moved in over the upstanding edge and which complete theedge and the fold at the pointed extremity of the blank as shown in Fig.22 of the drawings. 7

Having thus fully described the invention, what is claimed, is j 1. In afolding machine of the character described, a table having a welltherein, a bed plate in the said well, mould plates resting on saidtable and overlapping the said well and having cutouts corresponding tothe contour of the end portions of the article to be formed, said mouldplates being movable towards and from each other to-determine the lengthof the article when formed, a die disposed above said bed plate, meansfor carrying said die and moving the same towards and away from said bedplate, means for turning the edge portions of a blank over said die whenthe blank is clampsections being movable towards the intermediate platesections, and means carried by the end sections for turning the cornerportions of a blank upwardly for the fold ing of the same downwardly andunder the main'portion of the blank when the intermediate plates aremoved inwardly toward each other to fold the edge portions of the blankupon the die.

3. In a folding machine of the character described, a table'having awell therein, a

bed plate in the said well, an arm pivoted to said table, a die carriedby said arm and disposed above said well, a lever pivoted to said tableand having one end engageable with said arm, a treadle bar, a linkconnecting said treadle bar to said lever for imparting movement to thesame and to depress said arm and die, a mold upon said table andoverlapping the said well and having a die receiving opening conformingto the contour of said die, and seam turning plates slidable above themold for engaging edge portions of a blank clamped between said die andsaid bed plate and turning the edge portions of the blank down upon thedie substantially as and for the purpose set forth.

l. In a folding machine of the character described, a table having awell, a bed plate in the said well, a die disposed over the said well,means for supporting said die for movement towards and away from saidbed plate, means for imparting movement to said die supporting means,turning plates slidable horizontally for engaging edge portions of ablank and folding the same over onto said die to form a seam portion,inclined arms slidable vertically, sliding heads receiving said arms andhaving track forming heads, blocks slidable horizontally in said heads,the arms embodying inclined cam pins extending through inclined openingsin said blocks to impart sliding movement to the blocks When the armsare moved vertically,-bars connected with said blocks and havinglongitudinally extending slots there in, heating plates disposed abovesaid turn ing plates and having inclined slots there in, stems extendingfrom said turning plates through the slots of said bars and heatingplates, and means for moving said arms vertically to impart horizontalmovement to the said blocks and bars and through the medium of saidstems to impart sliding movement to said turning plates.

EDWARD B. ROBY.

